It seems in this day and age if you have steady employment you’d want to stick with it. I know, nothing ventured, nothing gained, but I would think, in show business especially, if you’re that good, they’d come to you. If you’ve got something big (and fairly permanent) lined up you should go for it. But if not, well, a steady paycheck is a wonderful thing. Look how many Days’ actors have gone off to do a move and then nothing.
Even a movie isn’t much of a guarantee. Unless it’s a smash and producers are banging on your door, once it’s over, it’s over and you’re back in the unemployment line.